Final answer:
Léger-Félicité Sonthonax attempted to strengthen the alliance between mixed-race people and whites in Saint-Domingue by upholding the promise of the French Revolution to extend equal rights to wealthy free people of color to maintain order and French control.
Step-by-step explanation:
The French commissioner Léger-Félicité Sonthonax tried to cement the alliance between mixed-race people (gens de couleur libres) and whites on Saint-Domingue (modern-day Haiti) during the Haitian Revolution. He aimed to establish peace and maintain French control over the colony amidst the growing rebellion led by enslaved people and free people of mixed race.
Despite the initial divisions between these groups, Sonthonax's policies sought to appease the gens de couleur libres by upholding the extension of equal rights to wealthy free people of color, a promise made by the French Revolution, in the hopes of re-establishing stability.